There is a 30/100 of a liter of orange juice in one container and 5/10 of pineapple juice in another container. if mrs. smith combines the two juices, how much orange-pineapple juice will she have?

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%